Kacper is a given name. Notable people called Kacper include:
Kacper Denhoff (1587–1645), Baltic-German noble of the Holy Roman Empire; a noble of the Polish-Lithuanian Commonwealth; Governor of Dorpat ProvinceKacper Filipiak (born 1995), Polish former professional snooker playerKacper Gomolski (born 1993), Polish motorcycle speedway rider who rides for the Poole Pirates in the Elite LeagueKacper Kosinski, member of The Analogs, a Polish street punk bandKacper Kozłowski (born 1986), Polish sprint athlete who specializes in the 400 metresKacper Ławski (born 1985), Polish rugby player, second or third line of the lock in the French club CS VienneKacper Łazaj (born 1995), Polish footballerKacper Majchrzak (born 1992), Polish swimmerBronislaw Kacper Malinowski (1884–1942), Polish anthropologistKacper Piechocki (born 1995), Polish volleyball playerKacper Piorun (born 1991), Polish chess grandmaster (2012)Kacper Przybyłko (born 1993), Polish footballerKacper Sikora (born 1992), Polish singer who won the fourth series of Poland's Got Talent in 2011Kacper Tatara (born 1988), Polish footballerKacper Ziemiński (born 1990), Polish sailor